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Extraction method of gardenia yellow pigment

A technology of gardenia yellow pigment and extraction method, which is applied in the field of extraction of gardenia yellow pigment, can solve the problems of precipitation, low polarity, and low solubility, and achieve the effects of promoting leaching, increasing concentration, and increasing extraction rate

Active Publication Date: 2021-04-30
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditionally, ethanol is used as the extraction agent, because the polarity of ethanol is small, and the solubility of other polar macromolecules such as pectin and protein in the fruit of Gardenia jasminoides is small, so 60 wt.% ethanol-water is used as the extraction solvent , the purity of the leachate is relatively high, but after concentration, add 2 times the volume of absolute ethanol, shake it up and let it stand for observation, and there will be precipitation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020]A method of extracting a gardenia yellowish, the preparation method comprising the steps of:

[0021]Step. First. After the yellow scorpion fruit is removed, the peel is dried into powder, over 30 mesh sieve, then use water with 5: 1 liquid than the first extraction of 30 min at room temperature;

[0022]Step II. Solid-liquid separation of the first leaching liquid, take the supernatant as the first extract, and then extract 15 min at room temperature in the remaining solid mixture of 3: 1 liquid. The second extraction liquid is obtained, and then the second extraction liquid is separated, and the supernatant is taken as the second extract, and the secondary solid-liquid separation is used with a horizontal spiral settlement centrifuge. The rotational speed is 4000 r. / min, centrifugation 20 min;

[0023]Step 3. The first extract and the second extract were combined, and 0.002 wt.% Pectin and 2 wt.% Diatomaceous earth were stirred after stirring 40 min, and the aperture was 0.22 mm fi...

Embodiment 2

[0027]A method of extracting a gardenia yellowish, the preparation method comprising the steps of:

[0028]Step. First. After the Huajizi fruit is removed, the dust is grinded into powder, and the 40 mesh sieve is then used in water with water, and the water is allowed to extract 40 min at room temperature.

[0029]Step 2. Solid-liquid separation of the first leaching liquid, take the supernatant as the first extract, and then extract 25 min at room temperature in the remaining solid mixture of 4: 1. The second extraction liquid is obtained, and then the second leaching liquid is solid-liquid separately, and the supernatant is taken as the second extract, and the secondary solid-liquid separation uses the horizontal spiral settlement centrifuge, and the rotational speed is 4500 r. / min, centrifugation 10 min;

[0030]Step 3. Combine the first extract and the second extract, add 0.004 wt.% Pectinase and 3 wt.% Diatomaceous earth charge and then stand for 50 min after stirring, and filtered t...

Embodiment 3

[0034]A method of extracting a gardenia yellowish, the preparation method comprising the steps of:

[0035]Step 1. When the yellow scorpion fruit is removed, it is dried into powder, and the 30 mesh sieve is then used, then water with a 6: 1 liquid ratio of 35 min;

[0036]Step II. Solid separation of the first leaching liquid, take the supernatant as the first extract, and then extract 20 min at room temperature in the remaining solid mixture of 3: 1 liquid ratio to the remaining solid mixture. The second extraction liquid is obtained, and then the second leaching liquid is solid-liquid separated, and the supernatant is taken as the second extract, and the solid-liquid separation of the secondary spiral is separated from the centrifuge, the rotation speed is 4200 r. / min, centrifugation 15 min;

[0037]Step 3. Merge the first extract and the second extract, add 0.002 wt.% Pectinase and 2 wt.% Diatomaceous earth charge and then stand 45 min, and filtered through a pore diameter of 0.22 mm f...

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Abstract

The invention provides an extraction method of gardenia yellow pigment. The extraction method comprises the following steps: removing peels of gardenia fruits, drying in the sun, grinding into powder, sieving, and extracting with water for the first time; carrying out solid-liquid separation on the leaching solution to obtain a first extracting solution, then adding water into the remaining solid mixture, carrying out secondary extraction under ultrasonic waves, and carrying out solid-liquid separation on the second leaching solution to obtain a second extracting solution; combining the two extracting solutions, adding pectinase and diatomite, fully stirring, standing, filtering by a filter membrane, carrying out microfiltration, and taking the microfiltrate; purifying the micro-filtrate by using petroleum ether to obtain a purified extracting solution; and carrying out weight reduction concentration on the purified extracting solution through a reverse osmosis membrane, separating geniposide from the concentrated pigment solution through membrane separation to obtain a separation solution, and carrying out vacuum freeze drying. According to the extraction method, high-valence gardenia yellow pigment can be efficiently extracted from gardenia jasminoides fruits, and the extracted gardenia yellow pigment is not easy to generate green stain and grey stain and is long in storage time.

Description

Technical field[0001]The present invention belongs to the field of natural pigment extraction, and in particular to a method of extracting a gardenin yellowish.Background technique[0002]Natural pigments are widely used in the food industry as a good edible colorant. Due to the high price of natural edible pigments, it is limited by production technology, and its application in domestic food manufacturing industry is relatively small. Gardenia is a natural edible yellowish extracted from the ripe fruits of 科 科 黄 黄, has certain nutrition and health value. With the enhancement of people's environmental awareness, natural edible pigments have gradually replaced chemical pigments have become an inevitable trend.[0003]Traditional gardenia is generally chosen by 60 wt.% Or more ethanol-water as a leach. Traditionally, ethanol is used to be infiltrating agent, because of the polarity of ethanol, pectin, protein, etc. in Huijizi, and other polar molecules in the protein are small, 60 wt.% Et...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00C09B67/54
CPCC09B61/00C09B67/0096
Inventor 郑光耀闫林林
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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